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Rượu etylic \(C_2H_5OH\)
Axit axetic \(CH_3COOH\)
\(n_{CO_2}=\dfrac{2,24}{22,4}=0,1mol\)
\(2CH_3COOH+Na_2CO_3\rightarrow2CH_3COONa+H_2O+CO_2\uparrow\)
0,2 0,1 0,2 0,1 0,1
\(\%m_{CH_3COOH}=\dfrac{0,2\cdot60}{39,6}\cdot100\%=30,3\%\)
\(\%m_{C_2H_5OH}=100\%-30,3\%=69,7\%\)
a)
\(n_{CO_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)
PTHH: 2CH3COOH + Na2CO3 --> 2CH3COONa + CO2 + H2O
0,2<----------0,1<-------------0,2<-------0,1
=> \(m_{CH_3COOH}=0,2.60=12\left(g\right)\)
\(\%m_{CH_3COOH}=\dfrac{12}{39,6}.100\%=30,3\%\)
\(\%m_{C_2H_5OH}=\dfrac{39,6-12}{39,6}.100\%=69,7\%\)
b) dd sau pư chứa \(\left\{{}\begin{matrix}CH_3COONa:0,2\left(mol\right)\\C_2H_5OH:\dfrac{39,6-12}{46}=0,6\left(mol\right)\end{matrix}\right.\)
\(V_{dd}=\dfrac{0,1}{2}=0,05\left(l\right)\)
=> \(\left\{{}\begin{matrix}C_{M\left(CH_3COONa\right)}=\dfrac{0,2}{0,05}=4M\\C_{M\left(C_2H_5OH\right)}=\dfrac{0,6}{0,05}=12M\end{matrix}\right.\)
a, \(C_2H_5OH+Na\rightarrow C_2H_5ONa+\dfrac{1}{2}H_2\)
\(C_2H_5OH+K\rightarrow C_2H_5OK+\dfrac{1}{2}H_2\)
\(C_2H_5OH+CH_3COOH⇌CH_3COOC_2H_5+H_2O\) (xt: H2SO4 đặc, to)
b, \(CH_3COOH+Na\rightarrow CH_3COONa+\dfrac{1}{2}H_2\)
\(CH_3COOH+K\rightarrow CH_3COOK+\dfrac{1}{2}H_2\)
\(CH_3COOH+C_2H_5OH⇌CH_3COOC_2H_5+H_2O\) (xt: H2SO4 đặc, to)
\(CH_3COOH+NaOH\rightarrow CH_3COONa+H_2O\)
\(2CH_3COOH+Zn\rightarrow\left(CH_3COO\right)_2Zn+H_2\)
\(n_{C_2H_5OH}=\dfrac{92}{46}=2\left(mol\right)\)
\(CM_{C_2H_5OH}=\dfrac{2}{0,25}=8M\)
\(C\%_{doruou}=\dfrac{92}{250.0,8}.100=46^o\)
Chọn B
\(C_6H_{12}O_6+6O_2\underrightarrow{to}6CO_2+6H_2O\)
\(C_6H_{12}O_6\left(glucozo\right)\) \(\underrightarrow{^{30-35^oC,men.rượu}}\) \(2CO_2+2C_2H_5OH\)
\(a,V_{C_2H_5OH}=\dfrac{10.96}{100}=9,6\left(ml\right)\\ m_{C_2H_5OH}=9,6.0,8=7,68\left(g\right)\\ n_{C_2H_5OH}=\dfrac{7,68}{46}=\dfrac{96}{575}\left(mol\right)\)
PTHH: 2C2H5OH + 2Na ---> 2C2H5ONa + H2
\(\dfrac{96}{575}\)------------------------------------->\(\dfrac{48}{575}\)
\(V_{H_2}=\dfrac{48}{575}.22,4=1,87\left(l\right)\)
\(b,V_{dd}=12+10,6=20,6\left(ml\right)\\ Đ_r=\dfrac{9,6}{20,6}.100=46,6^o\)
2.
- Rượu: C2H5OH, CH3OH, CH3CH2CH2OH
- Axit: CH3COOH, CH3CH2COOH